A Researcher Records the Number of Individual Instruments Identified by Students

question 4

Multiple Choice

A researcher records the number of individual instruments identified by students listening to a piece of classical music.He splits the data into quartiles and reports that students correctly identified three instruments at the 25th percentile,five instruments at the 50th percentile,and eight instruments at the 75th percentile.What are the IQR and SIQR for these data?

• A) the IQR is 3; the SIQR is 1.5
• B) the IQR is 5; the SIQR is 5.0
• C) the IQR is 5; the SIQR is 2.5
• D) There is not enough information to answer this question.

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